* {
    margin: 0; padding: 0; box-sizing: border-box;
}

body {
    background-color: #ad9b9b;
    color: #234;
    font-family: verdana;
}

h1 {
    text-align: center;
    margin: 0;
    border-bottom: 2px solid rgb(10, 11, 12);
    padding-bottom: 8px;
}

h2 {
    margin: 8px;
    font-weight: normal;
    background-color: rgb(10, 10, 10);
    color: #EEE;
    padding: 4px;
}

.flex-parent {
    border: 4px solid transparent; 
    min-height: 100px;
    display: flex;
    margin: 8px 8px 40px 8px;
}

.flex-child {
    border: 4px solid rgb(124, 148, 124);
    min-height: 80px;
    margin: 8px;
    flex-grow: 1;
    text-align: center;
    font-weight: bold;
}

.demo2 .flex-parent {
    border: 4px solid transparent;
    justify-content: space-around;
}

.demo2 .flex-child {
    border: 4px solid lightpink;
    flex-grow: 0;
    min-width: 16px;
}

.demo3 .flex-parent {
    justify-content: space-between;
    border: 4px solid transparent;
}

.demo3 .flex-child {
    flex-grow: 0;
    min-width: 16px;
    border: 4px solid lightpink;
}

.demo4 .flex-parent {
    justify-content: space-evenly;
    border: 4px solid transparent;
}

.demo4 .flex-child {
    flex-grow: 0;
    min-width: 16px;
    border: 4px solid lightpink;
}

.demo5 .flex-parent,
.demo6 .flex-parent {
    border: 4px solid transparent;
}

.demo5 .flex-parent {
    flex-direction: row-reverse;
}

.demo5 .flex-child:last-child {
    background-color: rgb(72, 71, 122);
}

.demo6 .flex-parent {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-evenly;
}

.demo6 .flex-child {
    background-color: pink;
    min-width: 200px;
    flex-grow: 1;
}

.demo7 .flex-parent {
    border: 4px solid transparent;
    min-height: 200px;
    justify-content: center; 
}

.demo7 .flex-child {
    flex-grow: 0;
}

.demo7 .flex-child:last-child {
    background-color: rgb(53, 53, 87);
    max-height: 100px;
    min-width: 100px;
    aspect-ratio: 1;
    align-self: center;
}

.demo8 .flex-parent {
    border: 4px solid transparent;
    flex-flow: row wrap;
    justify-content: center;
    gap: 10px;
}

.demo8 .flex-child {
    flex-basis: 25%;
    margin: 0;
    flex-grow: 1;
}